There seems might be a different story for each of their changes (EP-350 v3 is a big change, for example), but from what I gathered, the difference between the last-built M80ti and the M80v2 is minimal. There might be a bigger difference between the first built M80ti and the current M80v2 though.
If you are truly holding out to buy because you are worried they will get a new model out as soon as you order, you may as well contact them directly. If you ask them, you may get an answer. If you don't, you sure won't get any answers!
